The MCPServers CRD is too big

[jhrozek]

The MCPServer CRD is getting big and users are reporting it can't be applied without server-side apply.

The biggest piece if the CRD is the embedded PodTemplateSpec that make up 8500 lines out of 9500 of the CRD.

We could tackle the problem as follows:

• create a custom type (like mcpServerTemplateSpec) with a subset of fields that users will generally care about. This will be an embedded type whose fields are visible in documentation and kubectl explain.
• for other fields add a new type (mcpServerRawTemplateSpec) that would be using runtime.RawExtension and converted into PodTemplateSpec on the operator side. This could be used for any fields but the users would not get client-side validation and docs.